Full Duplex; Resilient Links; Virtual Lans (Vlans) - 3Com SuperStack II Switch 3000 10/100 User Manual

Full Duplex

The Switch 3000 10/100 provides full duplex sup-
port for all its ports, including Fast Ethernet Plug-in
Module ports. Full duplex allows frames to be trans-
mitted and received simultaneously and, in effect,
doubles the potential throughput of a link. In addi-
tion, full duplex also supports 100BASE-FX cable
runs of up to 2km (6562ft).
For more information about enabling full duplex,
refer to "Setting Up the Switch Unit"
Up the Switch Ports" in Chapter

Resilient Links

The Resilient Link feature in the Switch 3000 10/100
enables you to protect critical links and prevent net-
work downtime should those links fail. Setting up
resilience ensures that should a main communication
link fail, a standby duplicate link immediately and
automatically takes over the task of the main link.
Each main and standby link pair is referred to as a
resilient link pair.
For more information about resilient links, refer to
"Setting Up Resilient Links"
and "Setting
4.
on page 4-20.
About the Switch 3000 10/100

Virtual LANs (VLANs)

The Switch 3000 10/100 has a Virtual LAN (VLAN)
feature which allows you to build your network seg-
ments without being restricted by physical connec-
tions. A VLAN is defined as a group of location- and
topology-independent devices that communicate as
if they are on the same physical LAN. Implementing
VLANs on your network has three main advantages:
It eases the change and movement of devices on
IP networks. If an endstation in VLAN 1 is moved
to a port in another part of the network, you
only need to specify that the new port is in
VLAN 1.
It helps to control broadcast traffic. If an endsta-
tion in VLAN 1 transmits a broadcast frame,
then only VLAN 1 devices receive the frame.
It provides extra security. Devices in VLAN 1 can
only communicate with devices in VLAN 2 using
a router.
For more information about setting up VLANs, refer
to "Virtual LANs (VLANs)"
1-3
on page 5-1.